Electronic equipment

Abstract: An electronic equipment, such as a recording and/or reproducing apparatus for recording and/or reproducing an information signal in and/or from a recording medium, includes a drive mechanism portion (40), a chassis (2), an upper lid (12), a lower lid (11), a panel frame (13) and a battery compartment portion (5). The chassis (2) is shaped as substantially square and frame by bending a band-shaped sheet metal. The chassis (2) supports therein the drive mechanism portion (40) through a damping mechanism. The upper lid (12) is made of a metal material and attached to one surface side of the chassis (2) so as to open and/or close the drive mechanism portion (40). The lower lid (11) is made of a metal material and attached to the chassis (2) so as to close the other surface of the chassis (2). The panel frame (13) is substantially U-letter in shape and made of a synthetic resin. The panel frame (13) has a plurality of operation buttons (18) provided thereon and is attached to the outside of the chassis (2). The battery compartment portion (5) has substantially the same thickness obtained under the condition that the lower lid (11) is attached to the chassis (2) and that the drive mechanism portion (40) is closed by the upper lid (12). The battery compartment portion (5) is made of a metal material and attached to one side wall of the chassis (2).

Description: The invention relates to electronic equipment and, particularly to electronic equipment having a chassis. Recently, for electronic equipments, such as disc players or tape cassette players, small and thin electronic equipments that are excellent in portability are now very popular on the market. To make these portable electronic equipments small and thin, it has been proposed to simplify a drive mechanism portion of electronic equipment as much as possible. However, there is a limit to such efforts to simplify the drive mechanism portion of the electronic equipment. Under the above-mentioned situation, to make these portable electronic equipments smaller and thinner, it is proposed to simplify the structure of a chassis on which the drive mechanism portion is supported. However, if the chassis is simplified in structure, then the chassis is lowered in strength. Therefore, it is not possible to provide electronic equipments that can be used satisfactorily in actual practice. European Patent Specification No. 0528420 discloses a disk loading system for a disk recording/reproducing system. The loading system includes a base plate that carries a disk drive, and a cartridge holder pivotally attached to said base plate. A battery compartment is also provided. According to one aspect of the invention, there is provided electronic apparatus comprising: a substantially square chassis; a drive mechanism supported on the interior of the chassis; and a battery compartment connected to the chassis, one or more batteries being receivable in said compartment to power the apparatus; characterised in that: said battery compartment is of rigid material and is connected to the outside of the chassis; and in that said chassis is annular and comprises a u-shaped unitary member bent from sheet metal and having an open end, a cross-piece being attached to the u-shaped unitary member to close the open end thereof, said battery compartment being attached to the outside of a wall of said chassis to inhibit flexure of said chassis. Since the chassis is made frame in shape by bending the sheet metal, even when the chassis structure is simplified, it is possible to increase rigidity of the chassis by attaching the battery compartment portion to the chassis as a rigid member. Since the chassis which supports thereon the drive mechanism portion is simplified in structure, the electronic equipment can be miniaturized and made thinner. The invention is diagrammatically illustrated by way of example in the accompanying drawings, in which:- Figure 1 is a perspective view of a disc player according to an embodiment of the present invention; Figure 2 is an exploded perspective view of the disc player according to the embodiment of the present invention; Figure 3 is an exploded perspective view of a chassis and a mechanical deck portion of the disc player according to the embodiment of the present invention; Figure 4 is an exploded perspective view of the chassis and a battery case portion of the dis player according to the embodiment of the present invention; Figure 5 is an exploded perspective view of a battery lid and a pivot portion of an upper lid of the disc player according to the embodiment of the present invention; Figure 6 is a plan view, partly in cross-sectional form, of the battery lid of the disc player according to the embodiment of the present invention; FIGURE 7 is a plan view of the pivot portion of the battery lid of the disc player according to the embodiment of the present invention; FIGURE 8 is an exploded perspective view of a panel frame at its portion in which operation buttons are disposed; FIGURE 9 is a longitudinal cross-sectional view of the panel frame at its portion in which the operation buttons are disposed; FIGURE 10 is a perspective view showing the rear surface of the upper lid of the disc player according to the embodiment of the present invention; FIGURE 11 is a perspective view of a mechanical deck portion of the disc player according to the embodiment of the present invention; FIGURE 12 is an exploded perspective view of an eject mechanism portion of the disc player according to the embodiment of the present invention; FIGURE 13 is a diagram used to explain engagement between an engagement tab of an eject lever of the eject mechanism and a concave portion of the disc cartridge; FIGURE 14 is a side view used to explain operation of the eject mechanism and illustrating the state that the disc cartridge is not yet inserted into the cartridge holder; FIGURE 15 is a side view used to explain operation of the eject mechanism and illustrating the state that the disc cartridge was inserted into the cartridge holder; FIGURE 16 is a side view used to explain operation of the eject mechanism and illustrating the state that the disc cartridge is loaded onto a predetermined loading portion; and FIGURE 17 is a side view used to explain operation of the eject mechanism and illustrating the state that the disc cartridge was ejected from the cartridge holder. An electronic equipment according to an embodiment of the present invention will hereinafter be described with reference to the drawings. In the following embodiment, the case that the present invention is applied to a disc player will be described. FIGURE 1 is a perspective view showing an outer face of a disc player 1 to which the embodiment of the present invention is applied. As shown in FIGURE 1, a magneto-optical disc, i.e., an optical disc 100 (hereinafter simply referred to as a disc) that is loaded on the disc player 1 is accommodated within a cartridge (hereinafter referred to as a disc cartridge) 101 made of a plastic material so as to become rotatable. A signal, i.e., signal representing a piece of music or the like is already recorded on the disc 100. The disc cartridge 101 in which the disc 100 is accommodated is loaded onto the disc player 1 and thereby the disc 100 is reproduced. The disc player 1 is made smaller and thinner as compared with the conventional disc players of the same kind because the disc player 1 is designed with a great stress on the portability. The disc player 1 is of a ultra-thin type disc player and has a thickness of 18.5 mm. The structure that can make the disc player 1 become small and thin will be described with reference to FIGURES 2 to 4. In FIGURES 2 to 4, reference numeral 2 designates a maim chassis (hereinafter simply referred to as a chassis) which serves as a fundamental framework of the disc player 1. As shown in FIGURES 3 and 4, the chassis 2 is of a frame which comprises four side wall portions, i.e., a left side wall portion 2a, a rear side wall portion 2b, a right side wall portion 2c and a front side wall portion 2d each composed of a thin sheet metal. The left side wall portion 2a, the rear side wall portion 2b, the right side wall portion 2c of the chassis 2 are formed by bending a sheet metal in a U-shaped fashion to which a sheet metal forming the front side wall portion 2d is fixed, thereby forming the frame-shaped chassis 2 having four walls. A disc drive mechanism portion 40 on which the disc cartridge 101 is loaded is accommodated within the chassis 2. The disc drive mechanism portion 40 will be described more fully later on. To the lower surface of the chassis 2 is fixed a circuit board 3 on which a disc drive circuit and a signal reproducing circuit, not shown, are disposed by screws 4. Reference numeral 5 denotes a battery case which houses a battery 6 as a power supply of the disc player 1. The battery case 5 is made of a rigid material molded by zinc die casting, for example. The battery case 5 is attached to the right side wall portion 2c of the chassis 2. A structure of a portion in which the battery case 5 and the chassis 2 are secured to each other will be described more in detail with reference to FIGURE 4. Projected portions 2c1, 2c2 are projected from the upper edge of the right side wall portion 2c of the chassis 2. On the other hand, vertically elongated engagement apertures 7a, 7b are formed on the side wall of the battery case 5 in association with the projected portions 2c1, 2c2. The projected portions 2c1, 2c2 of the chassis 2 are engaged into the engagement apertures 7a, 7b upwardly. Then, the right side wall portion 2c of the chassis 2 and the battery case 5 are fastened together by screws 8 in the direction perpendicular to the direction in which the projected portions 2c1, 2c2 are engaged into the engagement apertures 7a, 7b. Because the battery case 5 made of a rigid material is fixed to the right side wall portion 2c of the chassis 2 formed as a frame by bending the thin sheet metal, strength of the chassis 2 can be considerably increased as compared with the case that the chassis 2 is not provided with the battery case 5. The battery 6 that is accommodated into the battery case 5 as the operation power supply is an exclusively-prepared battery of rechargeable type. The disc drive mechanism portion 40 and electronic circuits on the circuit board 3 are energized by contacting electrodes 6a, 6b formed on one end face of the battery 6 terminals 9a, 9b of an input base plate 9 disposed within the battery case 5. An opening portion of the battery case 5 through which the battery 6 is loaded or unloaded is opened and/or closed by a battery lid 10 which is pivotally supported to the chassis 2 in the horizontal direction. A structure of the battery lid 10 will be described later on. The chassis 2 whose strength is increased by fixing the battery case 5 made of the rigid material thereto is covered with a lower lid 11, an upper lid 12 and a panel frame 13 composing the housing of the disc player 1. The lower lid 11 is made of an aluminum plate and is of such a size as to cover the lower surface of the chassis 2 to the lower surface of the battery case 5. The lower lid 11 is fixed to the chassis 2 and the battery case 5 by screws. 14. The chassis 2 includes on its rear portion pivotally supported a pair of arms 15a, 15b each made of a sheet metal so that the pair of arms 15a, 15b can be rotated in the vertical direction (upper and lower direction). The upper lid 12 that is formed of the aluminum plate so as to cover the upper surface of the chassis 2 is secured to the pair of arms 15a, 15b by screws 16. Specifically, the upper lid 12 can be rotated in the upper and lower direction relative to the chassis 2 and arranged as an openable and/or closable lid which opens and/or closes the disc cartridge loading portion of the disc drive mechanism portion 40. The panel frame 13 disposed between the lower lid 11 and the upper lid 12 is a U-shaped frame made of a hard plastic material so that the panel frame 13 can be extended along the left side wall portion 2a, the rear side wall portion 2b and the front side wall portion 2d of the chassis 2. The panel frame 13 is fixed to the outer peripheral surface of the chassis 2 by screws 17. The panel frame 13 includes at its central wall portion facing to the left side wall portion 2a of the chassis 2 provided a variety of operation buttons 18, i.e., six kinds of operation buttons, such as PLAY, FAST FORWARD, REVERSE, PAUSE, STOP and VOLUME ADJUSTMENT of the disc. Operation of the disc is switched and volume is adjusted by depressing touch-sensitive switches 19a fixed to the left side wall portion 2a of the chassis 2 with the respective operation buttons 18. As described above, in the disc player 1 according to this embodiment, strength of the chassis 2 is increased by fixing the battery case 5 made of the rigid material to the frame-shaped chassis 1 made of the thin sheet metal. Further, the lower lid 11 made of aluminum is fixed across the chassis 2 and the battery case 5, and the upper lid 12 made of aluminum is attached to the upper surface of the chassis 2. Furthermore, the panel frame 13 made of the hard plastic material is fixed to the outer peripheral surface of the chassis 2. Consequently, it is possible to construct the disc player which can generally be made small, thin and light and whose strength can be made sufficient in actual practice. The disc player structure according to this embodiment uses special structures for the pivot portion of the battery lid 10 that opens and/or closes the battery case 5 and the pivot porion of the upper lid 12 that opens and/or closes the disc loading portion in order to miniaturize the disc player. These structure portions will be described with reference to FIGURE 5. As shown in FIGURE 5, the battery lid 10 comprises a rotating plate 10a pivotally supported to the chassis 2 so as to open and/or close the opening portion of the battery case 5 and a lid body 10b attached to the rotating plate 10a so as to become slidable along the surface direction of the rotating plate 10a in a predetermined range. The lid body 10b includes an engagement protrusion 21 formed at the tip end portion thereof. On the other hand, the battery case 5 includes at its opening edge an engagement aperture 22 bored as shown in FIGURE 6. The battery lid 10 closes the opening portion of the battery case 5 under the condition that the lid body 10b is moved to the free end portion side of the rotating plate 10a. Then, the battery lid 10 is locked by engaging the engagement protrusion 21 with the engagement aperture 22 after the lid body 10b was moved to the base end portion side of the rotating plate 10a from this state. The pivot portion of the thus arranged battery lid 10 relative to the chassis 2 is provided at substantially the same portion as one pivot portion of the upper lid 12. As shown in FIGURE 5, first bearing portions 23a, 23b to which the battery lid 10 is pivotally supported are symmetrically formed on upper and lower edges of the right side wall portion 2c near the bent portion between the rear side wall portion 2b and the right side wall portion 2c of the chassis 2. A second bearing portion 25 that pivotally supports the right arm 15b to which the upper lid 12 is attached is formed between the upper and lower first bearing portions 23a and 23b. Each of the first bearing portions 23a, 23b that pivotally support the battery lid 10 is projected as a U-shaped member in which the base portion is erected vertically and the tip end portion is inwardly bent in the horizontal direction. In association therewith, upper and lower projected portions 10a1, 10a2 projected on the base end portion of the rotating plate 10a of the battery lid 10 include supporting shafts 24a, 24b projected therefrom in an opposing relation. The upper and lower supporting shafts 24a, 24b can be assembled with ease when the upper and lower supporting shafts 24a, 24b are inserted into and engaged with the first bearing portions 23a, 23b from the lateral direction. In this structure, flange portions 24a1, 24b1 are respectively formed on the root portions of the supporting shafts 24a, 24b. When the battery case 5 is fixed to the right side wall portion 2c of the chassis 2 after the supporting shafts 24a, 24b were engaged with the first bearing portions 23a, 23b, the flange portions 24a1, 24b1 are brought in contact with one portion of the battery case 5. Thus, the battery lid 10 can be assembled accurately without wobbling under the condition that the supporting shafts 24a, 24b are prevented from being disengaged from the first bearing portions 23a, 23b (see FIGURE 7). The second bearing portion 25 that pivotally supports the arm 15b to which the upper lid 12 is attached is projected in an erected tab fashion between the first bearing portions 23a and 23b in the direction perpendicular to the first bearing portions 23a, 23b. The arm 15b is pivotally supported by a caulking pin 26 to the second bearing portion 25 so that the arm 15b can be rotated in the vertical direction. The pivot portions of the battery lid 10 and the upper lid 11 whose rotating directions are different are efficiently disposed on the chassis 2 and the space can effectively be used, thereby the disc player being miniaturized advantageously. Further, in the disc player 1 according to this embodiment, there is considered a structure that the portions in which the operation buttons 18 are disposed on the panel frame 13 can maintain sufficient strength. The structure of the panel frame 13 will be described with reference to FIGURES 8 and 9. As illustrated, the panel frame 13 includes concave portions 27 corresponding to the operation buttons 18. The operation buttons 18 are properly disposed in the concave portion 27. Each operation button 18 includes on its rear surface two kinds of pins 28, 29. The pins 28, 29 are faced to the inner surface of the panel frame 13 via through-holes 30, 31 bored on the bottom portion of the concave portion 27. Of the two kinds of the pins 28, 29, one pin 28 is opposed to the touch-sensitive switch 19a of the switch base plate 19 fixed to the left side wall portion 2a of the chassis 2. The other pin 29 is coupled to a plate spring 32 fixed to the inner side surface of the panel frame 13. As shown in FIGURE 8, the plate spring 32 includes flexible portions 32a formed by predetermined slits in accordance with the respective operation buttons 18. The pin 29 of each operation button 18 is connected and fixed to the flexible portion 32a by melt-bonding caulking. Each operation button 18 is urged to return to the original state under spring force of the flexible portion 32a of the plate spring 32. Also, the pin 28 is brought in contact with the touch-sensitive switch 19a via a through-hole 32b bored through the plate spring 32. When the operation button 18 is depressed against the spring force of the plate spring 32, the touch-sensitive switch 19a corresponding to the operation button 18 is energized and various operations of the disc, i.e., PLAY, FAST FORWARD, REVERSE, PAUSE, STOP are switched or volume is adjusted by VOLUME ADJUSTMENT. With the above-mentioned arrangement, the panel frame 13 according to this embodiment can maintain sufficient strength as compared with the attachment structure of the ordinary operation button 18. Specifically, in the ordinary structure, the panel frame 13 includes the through-holes through which the operation buttons 18 are entered. Since the strength of the panel frame 13 is considerably lowered at the lightening hole portions formed by the through-holes, the concave portion 27 is used as the disposed portion in which the operation buttons 18 are disposed on the panel frame 13, i.e., the fundamentally important portions of the panel frame 13 are maintained, thereby making it possible to avoid strength of the panel frame 13 from being lowered. The strength of the panel frame 13 is sufficiently maintained, which can considerably contribute to the increase of the disc player 1 on the whole. An arrangement of the disc drive mechanism portion 40 that is accommodated in the chassis 2 will be described with reference to FIGURES 3 and 11. In FIGURES 3 and 11, reference numeral 41 depicts a mechanical chassis which serves as a base plate of the disc drive mechanism portion 40. The mechanical chassis 41 is supported to supporting members 2e projected from the inner surface side of the chassis 2 at a plurality of positions in the horizontal direction through a damping mechanism in a floating state. The damping mechanism is composed of a rubber damper 42 and a coil spring 43. On the mechanical chassis 41 are disposed a turntable 44 on which the disc 100 is held and which is rotated by a spindle motor (not shown) and an optical pickup (not shown) for reading a signal from the disc 100. Reference numeral 45 depicts a positioning pin projected on the mechanical chassis 41. While only one positioning pin 45 is illustrated, there are provided a pair of positioning pins 45 in actual practice. The mechanical chassis 41 includes at its bearing portion 46 formed at the rear end thereof a cartridge holder 47 for holding the disc cartridge 101 pivotally supported in the upper and lower direction. The cartridge holder 47 comprises an upper surface plate portion 47a, two side plate portions 47b, 47c downwardly bent from the left and right sides of the upper surface plate portion 47a at a right angle and lower supporting plate portions 47d, 47e projected from the inner lower ends of the two side plate portions 47b, 47c at a right angle which are integrally formed. The disc cartridge 101 is inserted into the cartridge holder 47 under the condition that the cartridge holder 47 is rotated with a predetermined angle relative to the mechanical chassis 41. Then, the cartridge holder 47 is downwardly rotated so as to overlap the mechanical chassis 41 from the above-mentioned state, whereby the disc cartridge 101 is loaded on the mechanical chassis 41 at its predetermined loading position. Specifically, at the same time when the disc cartridge 101 is properly positioned by engaging reference apertures formed on the lower surface of the disc cartridge 101 with the positioning pins 45, the disc 100 is held at its central portion exposed to the lower surface side of the disc cartridge 101 on the turntable 44. The cartridge holder 47 includes on its right side plate portion 47c a shutter releasing member 80 projected to the inner porion of the cartridge holder 47 to release a slide shutter 102. The cartridge holder 47 includes on the outer surface side of the right side plate portion 47c thereof attached a shutter closing lid member 48. The shutter closing lid member 48 is formed of a sheet metal, and a convex portion 48a of the shutter closing lid member 48 is projected to the inner portion of the cartridge holder 47 via a through-hole 49 of the right side plate portion 47c of the cartridge holder 47. When the disc cartridge 101 is inserted into the cartridge holder 47, the disc cartridge 101 is inserted into the cartridge holder 47 while the shutter 102 slides at its side surface along the convex portion 48a of the shutter closing lid member 48. When the disc cartridge 101 is inserted into the cartridge holder 47 up to its predetermined position, the convex portion 48a is engaged with the engagement aperture 102a of the shutter 102 and the shutter releasing member 80 is inserted into a groove formed on one side surface of the disc cartridge 101 and is thereby brought in contact with a shutter locking member (not shown) provided within the disc cartridge 101. Thus, the shutter releasing member 80 releases the shutter 102 from being locked by the shutter locking member and is brought in contact with the shutter 102. As a consequence, in accordance with the insertion of the disc cartridge 101, the shutter 102 is moved by the shutter releasing member 80 to expose a part of the disc 100 from the opening portion formed on the lower surface of the disc cartridge 101. Thus, a part of the disc 100 is opposed to an optical pickup (not shown). When the disc cartridge 101 is ejected from the cartridge holder 47, owing to the action of the shutter closing lid member 48 that is engaged with the engagement aperture 102a of the shutter 102 after the disc cartridge 101 was inserted into the cartridge holder 47, the shutter 102 is closed as the disc cartridge 101 is ejected from the cartridge holder 47. Although the rotation supporting point of the cartridge holder 47 and the rotation supporting point of the upper lid 12 are set at slightly displaced positions in the disc player 1 according to this embodiment, the cartridge holder 47 is rotated in unison with the opening and/or closing operation of the upper lid 12. Specifically, the cartridge holder 47 includes projected portions 47b1, 47c1 projected from left and right side plate portions 47b, 47c in the horizontal direction. The left and right arms 15a, 15b to which the upper lid 12 is fixed include projected portions 15a1, 15b1 inwardly projected in the horizontal direction. The projected portions 15a1, 15b1 are opposed to the lower portions of the projected portions 47b1, 47c1 of the cartridge holder 47. When the upper lid 12 is opened, the projected portions 15a1, 15b1 of the arms 15a, 15b come in contact with the projected portions 47b1, 47c1 of the cartridge holder 47 to elevate the projected portions 47b1, 47c1. As a consequence, the cartridge holder 47 is rotated in the upper direction following the upper lid 12. Maximum opening angles of the upper lid 12 and the cartridge holder 47 are set to 25° and 20°, respectively. The upper lid 12 includes left and right plate spring members 50, 51 fixed to its rear surface as shown in FIGURE 10. The plate spring members 50, 51 include resilient projection portions 50a, 50b and 51a, 51b projected therefrom in the front and back direction. The right plate spring member 51 includes a resilient projection portion 51c projected at its central portion. Any of the resilient projection portions 50a, 50b, 51a, 51b is bent with an inclination so that it is floated from the inner surface of the upper lid 12. When the upper lid 12 is closed, the resilient projection portion 51c of the right plate spring member 51 comes in contact with the upper surface plate portion 47a of the cartridge holder 47 to push the cartridge holder 47 in the lower direction. As a consequence, the cartridge holder 47 is rotated in the lower direction following the upper lid 12. When the upper lid 12 is closed completely, the central resilient projection portion 51c of the right plate spring member 51 urges the cartridge holder 47 against the mechanical chassis 41 side and the resilient projection portions 50a, 50b and 51a, 51b of the two plate spring members 50, 51 urge the disc cartridge 101 against the mechanical chassis 41 side. Thus, the disc cartridge 101 can reliably be loaded onto the disc cartridge loading portion on the mechanical chassis 41 without wobbling. With the above-mentioned arrangement, the front resilient projection portions 50a, 51a of the plate spring members 50, 51 are brought in contact with the disc cartridge 101 in front of the cartridge holder 47. On the other hand, the rear resilient projected portions 50b, 51b are brought in contact with the disc cartridge 101 through left and right through-holes 52a, 52b bored through the upper surface plate portion 47a of the cartridge holder 47. The upper lid 12 is locked by a lock mechanism under the condition that it is closed completely. The lock mechanism comprises a hook-shaped lock member 53 provided on the center of the front side wall portion 2d of the chassis 2 and an engagement plate 54 fixed to the inner surface side of the front end of the upper lid 12 in response to the lock member 53. When the upper lid 12 is closed completely, the upper lid 12 is locked by engaging an engagement concave portion 54a of the engagement plate 54 with the lock member 53. When the upper lid 12 is released from the locked state, it is possible to open the upper lid 12 by sliding a lock release operation member 55 provided in the panel frame 13 to disengage the lock member 53 from the engagement plate 54. When the upper lid 12 is released from the locked state and the upper lid 12 is opened, if the disc cartridge 101 is loaded onto the cartridge holder 47, then the disc cartridge 101 is ejected from the cartridge holder 47. An arrangement of an eject mechanism of this disc cartridge holder 47 will be described in detail with reference to FIGURE 12. As shown in FIGURE 12, the cartridge holder 47 includes on its right side plate portion 47c unitarily formed a supporting plate portion 57 projected from the lower end to the horizontal direction. The supporting plate portion 57 includes an eject lever 58 formed of a sheet metal supported thereto so as to become slidable in the front and rear direction, i.e., in the same direction as the direction in which the disc cartridge 101 is loaded onto and/or ejected from the cartridge holder 47. The eject lever 58 comprises a base plate portion 58a extended along the supporting plate portion 57 of the cartridge holder 47 and a resilient plate portion 58b and an extended plate portion 58c vertically erected from the front end portion of the base plate portion 58a along the right side plate portion 47c of the cartridge holder 47 which are integrally formed. Guide elliptic apertures 59a, 59b formed in the longitudinal direction of the base plate portion 58a are guided by guide pins 60a, 60b fixedly implanted on the supporting plate portion 57 of the cartridge holder 47 so that the eject lever 58 can be slid in a predetermined range in the front and back direction. The base plate portion 58a of the eject lever 58 includes a spring stop protrusion 58d projected from the front end thereof. A tension coil spring 61 is extended between the spring stop protrusion 58d and the front guide pin 60a. The eject lever 58 is constantly biased in the forward direction, i.e., in the eject direction of the disc cartridge 101 under spring force of the tension coil spring 61. The resilient plate portion 58b of the eject lever 58 includes on its tip end portion formed an engagement tab 62 made of a resin to be engaged with the concave portion 103 formed on the side portion of the disc cartridge 101. The engagement tab 62 is integrally formed with the eject lever 58 of made of the sheet metal by outsert molding. The engagement tab 62 is opposed to the inside of the cartridge holder 47 via a though-hole 63 of a rectangular shape bored through the right side plate portion 47c of the cartridge holder 47. Under the condition that the disc cartridge 101 is inserted into the cartridge holder 47, as shown in FIGURE 13, the engagement tab 62 is in engagement with the concave portion 103 of the disc cartridge 101, whereby the eject lever 58 is slid in unison with the disc cartridge 101. The engagement tab 62 of the eject lever 58 includes, in particular, an undercut portion 62 as shown in FIGURE 13. Specifically, the engagement tab 62 is undercut in concave shape at its root portion in which it is opposed to the concave portion 103 of the disc cartridge 101. Because the engagement tab 62 has the undercut portion 62a, the engagement tab 62 can be easily engaged with the concave portion 103 of the disc cartridge 101 reliably. Therefore, even when the disc cartridge 101 is inserted into the cartridge holder 47 with a slight inclination due to wobbling within the cartridge holder 47 as shown by a one-dot phantom line in FIGURE 13, the engagement tab 62 can be prevented from being escaped from the concave portion 103. Thus, the engagement state between the engagement tab 62 and the concave portion 103 can be maintained reliably. The eject lever 58 includes on the outer surface tip end portion side of the extended plate portion 58c erected a lock pin 64 that is engaged with a lock member 67 which will be described later on. Further, the extended plate portion 58c includes a guide pin 65 implanted on the inner surface side. The guide pin 65 is engaged with the guide rectangular opening 66 bored through the right side plate portion 47c of the cartridge holder 47 and is thereby guided so that the lock pin 64 is accurately opposed to and engaged with the lock member 67. The lock member 67 is pivotally supported by a shaft pin 68 to the rear end portion of the right side plate portion 47c of the cartridge holder 47. The lock member 67 includes on its tip end portion a tab portion 67a that is engaged with the lock pin 64 of the eject lever 58. The shaft pin 68 to which the lock member 67 is pivotally supported includes a torsion coil spring 69 mounted thereon. One end portion of the torsion coil spring 69 is engaged with the cartridge holder 47 side and the other end portion thereof is engaged with the lock member 67 side. Thus, the lock member 67 is constantly biased in the clockwise direction in FIGURE 12 under spring force of the torsion coil spring 69. The lock member 67 is locked at a predetermined rotational position, i.e., at the position in which the tab portion 67a is opposed to the lock pin 64 of the eject lever 58 when a part of the projected portion 67b comes in contact with a stopper projection 70 projected toward the cartridge holder 47 side. The lock member 67 includes an operation member 67c that is used to release engagement between the eject lever 58 and the lock pin 64. A lock releasing mechanism for operating the operation member 67c is disposed on the mechanical chassis 41 side. This lock releasing mechanism is of a so-called ratchet mechanism and releases engagement between the lock member 67 and the lock pin 64 by using rotational operation of the cartridge holder 47. In association with the lock member 67 of the cartridge holder 47 side, the mechanical chassis 41 includes a vertical wall 71 implanted in tab-shape in an opposing relation to the right side wall plate portion 47c of the cartridge holder 47. The vertical wall 71 includes a ratchet member 72 forming the ratchet mechanism pivotally supported thereto by a shaft pin 73. The ratchet member 72 includes on its one portion provided an action tab 72a opposing the operation member 67c of the lock member 67 and also includes on the other end portion thereof a stopper projection 72b. A torsion coil spring 74 is attached to the shaft pin 73 to which the ratchet member 72 is pivotally supported. One end portion of the torsion coil spring 74 is engaged with the vertical wall 71 side and the other end portion thereof is engaged with the ratchet member 72 side. The ratchet member 72 is biased in the opposite direction of the lock member 67, i.e., in the counter-clockwise direction shown in FIGURE 12 under spring force of the torsion coil spring 74. The ratchet member 72 is locked at a predetermined rotational position, i.e., at the position in which the action tab 72a is opposed to the operation member 67c of the lock member 67 when the stopper member 72b comes in contact with the upper edge portion of the vertical wall 71. The vertical wall 71 to which the ratchet member 72 is attached is inclined and bent such that a front portion 71a is opened toward the outside. Thus, the vertical wall 71 functions as a guide wall which can smoothly guide the eject lever 58 when the disc cartridge 101 is inserted into the cartridge holder 47. Operation of the eject mechanism thus arranged will be described in detail below. Initially, as shown in FIGURE 14, when the disc cartridge 101 is inserted into the cartridge holder 47 under the condition that the cartridge holder 47 is elevated relative to the mechanical chassis 41, i.e., under the condition that the upper lid 12 is opened, the engagement tab 62 of the eject lever 58 is engaged with the concave portion 103 of the side portion of the disc cartridge 101. As a result, the eject lever 58 is moved rearwardly in unison with the disc cartridge 101 against the spring force of the tension coil spring 61 at the same time when the disc cartridge 101 is moved. At that time, engagement between the engagement tab 62 and the concave portion 103 is reliably maintained because the engagement tab 62 of the eject lever 58 includes the undercut portion 62a as described above. As a consequence, even when the disc cartridge 101 is inserted into the cartridge holder 47 with a small wobble, the engagement tab 62 can be prevented from being disengaged from the concave portion 103. Even if the engagement tab 62 is disengaged from the concave portion 103, the resilient plate portion 58b of the eject lever 58 is guided by the vertical wall 71 of the lock releasing mechanism portion, thereby preventing the engagement tab 62 from being disengaged from the concave portion 103. Therefore, the eject lever 58 can reliably be moved in unison with the disc cartridge 101. When the disc cartridge 101 is inserted into the deepest portion of the cartridge holder 47 completely, as shown in FIGURE 15, the lock pin 64 of the eject lever 58 is engaged with the tab portion 67a of the lock member 67, thereby the eject lever 58 being locked. Engagement operation between the lock pin 64 and the lock member 67 will be described more in detail below. Initially, when the eject lever 58 is moved in the rearward direction, the lock pin 64 contacts with and presses the tip end of the inclined edge of the tab portion 67a of the lock member 67. The lock member 67 is rotated by the pressing force of the lock pin 64 downwardly against the spring force of the torsion coil spring 69. Then, when the lock pin 64 passes the tab portion 67a, the lock member 67 is returned to the original position under spring force of the torsion coil spring 69, whereby the lock pin 64 is engaged with the tab portion 67a. Thus, the eject lever 58 is locked. Then, the cartridge holder 47 is rotated in the lower direction by closing the upper lid 12 from the state that the eject lever 58 is locked after the disc cartridge 101 was inserted into the cartridge holder 47 completely. Under the condition that the disc cartridge 101 is loaded onto the disc cartridge loading portion provided on the mechanical chassis 41, as shown in FIGURE 16, the operation member 67c of the lock member 67 passes the action tab 72a of the ratchet member 72 and placed under the action tab 72a. The operation member 67c of the lock member 67 passes the action tab 72a of the ratchet member 72 as follows. Because the lock member 67 is restricted by the stopper member 70 from rotating in the clockwise direction, the operation member 67c of the lock member 67 contacts with and presses the operation tab 72a of the ratchet member 72. By the pressing force of the operation member 67c, the ratchet member 72 is rotated in the clockwise direction, i.e., in the direction in which the action tab 72a is escaped from the operation member 67c of the lock member 67 against the spring force of the torsion coil spring 74. As a result, the operation member 67c of the lock member 67 passes the action tab 72a of the ratchet member 72. When the cartridge holder 47 is rotated in the upper direction after the upper lid 12 was opened from this state as shown in FIGURE 17, the ratchet member 72 is restricted by the stopper member 72b from rotating in the counter-clockwise direction. Therefore, when the operation member 67c of the lock member 67 comes in contact with the action tab 72a of the ratchet member 72, the lock member 67 is rotated in the counterclockwise direction relatively to the cartridge holder 47 against the spring force of the torsion coil spring 69. Specifically, when the operation member 67c of the lock member 67 contacts with the action tab 72a of the ratchet member 73, the lock member 67 is left as it is while the cartridge holder 47 is rotated in the upper direction. Thus, the lock pin 64 is disengaged from the tab portion 67a of the lock member 67 and the lock member 67 is released from the locked state, whereby the eject lever 58 is moved in the forward direction and returned to the original position under spring force of the tension coil spring 61. As a result, the disc cartridge 101 is ejected from the cartridge holder 47 by the eject lever 58. When the cartridge holder 47 is elevated up to the uppermost rotational position after the upper lid 12 was opened completely, the operation member 67c of the lock member 67 passes the action tab 72a of the ratchet member 72 so that the lock member 67 is returned to the original state. The disc cartridge 101 is ejected from the cartridge holder 47 at the same time when the upper lid 12 is opened as described above. Therefore, the user can eject the disc cartridge 101 from the cartridge holder 47 with ease. While the disc player has been described as the electronic equipment so far, the present invention is not limited thereto and may be applied to a small electronic equipment, such as a cassette tape recorder or the like.

Claims: Electronic apparatus (1) comprising: a substantially square chassis (2); a drive mechanism (40) supported on the interior of the chassis (2); and a battery compartment (5) connected to the chassis (2), one or more batteries being receivable in said compartment (5) to power the apparatus (1); characterised in that: said battery compartment (5) is of rigid material and is connected to the outside of the chassis (2): and in that said chassis (2) is annular and comprises a u-shaped unitary member (2b,2c,2d) bent from sheet metal and having an open end, a cross-piece (2a) being attached to the u-shaped unitary member (2b,2c,2d) to close the open end thereof, said battery compartment (5) being attached to the outside of a wall (2c) of said chassis (2) to inhibit flexure of said chassis. Apparatus according to Claim 1, wherein said battery compartment (5) is made by zinc die casting. Apparatus according to Claim 1 or Claim 2, comprising: a panel frame (13) attached to the outside of said chassis (2), said panel frame (13) having a plurality of operation buttons (18) mounted thereon; an upper lid (12) attached to an upper surface side of said chassis (2) for rotation relative to said chassis (2) between open and closed positions, the upper lid (12) when closed covering said drive mechanism (40); and a lower lid (11) attached to said chassis (2) so as to close a lower surface side of said chassis (2). Apparatus according to Claim 3, wherein said upper and lower lids are of metal material. Apparatus according to Claim 3 or Claim 4, comprising a base plate (19) having a plurality of switches (19a) disposed thereon, the location of each of said switches (19) corresponding to the location of a respective one of said plurality of operation buttons (18) disposed on said panel frame (13); and wherein said panel frame (13) comprises a concave portion (27) with which said plurality of operation buttons (18) are engaged, and a plurality of apertures with which there are mated a plurality of protrusions (28,29) disposed on a rear wall side of each of said operation buttons (18); one of said protrusions (28) abutting a said switch (19) to operate the same, and others (29) of said protrusions engaging a plateshaped spring member (32) provided behind said panel frame (13) to provide a resilient bias to said operation buttons (18).. Apparatus according to any of Claims 3 to 5, wherein said panel frame (13) is of a synthetic resin material. Apparatus according to any preceding claim, wherein: said battery compartment (5) comprises a battery lid (10) for opening and/or closing said battery compartment (5); and said chassis (2) comprises a first bearing portion (23) on which said battery lid (10) is pivotally supported, and a second bearing portion (25) provided near said on which said upper lid (12) is pivotally supported, said battery lid (10) and said upper lid (12) being attached to said chassis (2) by said first (23) and second (25) bearing portions, respectively, to become openable and closable in directions different from each other. Apparatus according to Claim 7, wherein said first bearing portion (23) comprises a pair of bearing portions (23a, 23b) opposed to each other and having a predetermined spacing therebetween, said second bearing portion (25) being disposed between said pair of first bearing portions (23a, 23b). Apparatus according to any preceding claim, wherein drive mechanism (40) is supported on said chassis (2) through a damping mechanism. Apparatus according to any of Claims 3 to 6, comprising: a circuit board (3) attached to a lower surface side of said chassis (2) between said lower surface side of said chassis (2) and said lower lid (11). Apparatus according to any preceding claim, wherein said battery compartment (5) is attached to a wall (2c) of said chassis (2) opposite to said cross-piece (2a).

Inventors: HISHINUMA TAKASHI, KAKIZAKI MASAHIKO, OBA TOSHIHIDE, HISHINUMA, TAKASHI, KAKIZAKI, MASAHIKO, OBA, TOSHIHIDE, HISHINUMA, TAKASHI, C/O INTELLECTUAL PROPERTY DIV., KAKIZAKI, MASAHIKO, C/O INTELLECTUAL PROPERTY DIV., OBA, TOSHIHIDE, C/O INTELLECTUAL PROPERTY DIV.
Applicants: SONY CORP, SONY CORPORATION
Application year: 1994
Main classification: G11B33
IPC codes: G11B33, H05K7